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How to Wire a Three Way Switch to a Existing Single Pole Light Switch Circuit.


In this video, I explain just how easy it is to add a three-way switch to an existing single pole (one) switch lighting circuit. Now if you are trying to install a completely new 3-way circuit please my video with an article on how to install a three-way.  Otherwise, this may confuse you a little.

Even if you hire an electrician to do the job for you. You can still save a few bucks by installing the wire yourself. I mean that’s the hardest part to this.

The hardest part will be running the 4 wire from the existing switch to the new one. Take a look at my video and ask any questions if you need help.



Three way switch wiring

Three way switch wiring




You can also view this video right on VIDEO


How to Wire a Three Way Switch to a Existing Single Pole Light Switch Circuit.
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Comments ( 9 )

  1. Thank you

  2. Watch my video on how to install a 3 way switch to a existing one way.

  3. I have a single switch controlling a lite direct, power source is through the switch, how do I tie the 14/3 I have ran for 2nd switch location to where no need for rerouting the wire to the lite from second switch?

  4. You’ll need a four wire from switch to switch. Than watch the video again. It should be very clear.

  5. I have a 3way line from switch to light, but only one switch how can I hook the light up to work. Don’t know what to do with the red line

  6. Sometimes a picture is worth a thousand words.

  7. Thanks, A wiring diagram is great lesson 🙂

  8. admin

    Thank you so much. I posted the same diagram that I have on how to wire a three way. This page is how to add a three way to a exiting circuit. Thanks again..

  9. A wiring diagram for this “how to” would be extremely helpful.

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